I am tall.
I am not tall. / I'm not tall.
The marker is red.
Is the marker red?
Mary is not a teacher.
SHE is not a teacher.
What is your name?
My name is...
I amn't friendly.
WRONG: I am not friendly/ I'm not friendly.
He is my friend.
He is not my friend./ He isn't my friend.
The clocks are on the wall.
Are the clocks on the wall?
You and Jane aren't in the classroom.
YOU aren't in the classroom.
What's your phone number?
It's...
My friend and I am very intelligent.
WRONG: My friend and I ARE very intelligent (we)
Mary and Peter are students.
Mary and Peter aren't students.
The students are in the classroom.
Are the students in the classroom?
Are Joseph and Susan at home?
Are THEY at home?
How are you?
I am...
The books are in the bag?
WRONG: Are the books in the bag?
Your name is Ana.
Is your name Ana?
Is my cat friendly?
Is IT friendly?
Where are you from?
I'm from.../ We're from...
They isn't in class.
WRONG: They're not / aren't in class.
They are teachers.
They aren't teachers.
You and your brother are tall.
You and I aren't in Math class.
WE aren't in Math class.
What's your nationality?
I'm Brazilian/ We're Brazilian
My father isen't ugly.
WRONG: My father ISN'T ugly.